Home / 213,068-318,135

Finding the Third Proportional to 213,068 and 318,135

Calculator

Solution

The third proportional to 213,068 and 318,135 is: 475,012.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,068 : 318,135 = 318,135 : x
  2. Step 2: Convert to fraction form
    213,068/318,135 = 318,135/x
  3. Step 3: Cross multiply
    213,068x = 318,135 × 318,135
  4. Step 4: Simplify right side
    213,068x = 101,209,878,225
  5. Step 5: Solve for x
    x = 101,209,878,225/213,068
  6. Step 6: Final answer
    x = 475,012.10

Related Problems

Find third proportional to 106,534 and 159,067.50
Half scale
Find third proportional to 426,136 and 636,270
Double scale
Find third proportional to 213,070 and 318,138
Similar ratio
Find third proportional to 319,602 and 477,202.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.